Cover unit for ceiling rails



FIG. 1 is an enlarged fragmentary front elevational view of a cover unit for ceiling rails showing my new design; and,

FIG. 2 is a cross-sectional view taken along line 2--2 of FIG. 1.

The pattern of the cover unit for ceiling rails is constant throughout its length, and the broken lines showing ceiling panels and a support element are for illustrative purposes only, and do not form any part of the claimed design. 

The ornamental design for a cover unit for ceiling rails, as shown and described. 